Abstract
Our objective was to evaluate the effect of exercise on QT dispersion over the next 3 hours, as seen on a standard 12-lead electrocardiogram in patients with healed myocardial infarction with or without residual ischemia. We measured QT and QTc dispersion before, immediately after, and 1 and 2 hours after symptom-limited, dynamic treadmill exercise tests in 28 patients with healed anterior wall myocardial infarction with (group I, n = 18) and without (group II, n = 10) residual ischemia. The same protocol was followed in 5 group I patients after successful performance of coronary angioplasty. QT and QTc dispersion did not change immediately after exercise in group II. These parameters increased in group I (QT dispersion at rest [mean +/- SD] 57 +/- 22 ms, and after exercise 87 +/- 27 ms; QTc dispersion at rest 62 +/- 25 ms, and after exercise 114 +/- 36 ms). The increases in QT and QTc dispersion were sustained for at least 2 hours. After a successful coronary angioplasty in 5 patients, these parameters no longer increased with exercise. Thus, QT dispersion increased for at least 2 hours after exercise in patients who had residual ischemia after healing of myocardial infarction. Data obtained in 5 of these patients after corona...Continue Reading
References
Mar 1, 1992·The American Journal of Cardiology·N J LinkerD E Ward
Jan 1, 1992·British Heart Journal·C P DayR W Campbell
Nov 1, 1992·Circulation·J T HiiL B Mitchell
Jun 1, 1990·British Heart Journal·C P DayR W Campbell
Jan 1, 1988·The American Journal of Cardiology·J C CowanR W Campbell
Oct 1, 1985·Cardiovascular Research·H InoueT Sugimoto
Nov 1, 1980·The American Journal of Cardiology·G M KoppesF G Jones
May 1, 1983·Japanese Circulation Journal·Y SugishitaM Ueno
Jun 1, 1980·Journal of Molecular and Cellular Cardiology·H HircheM Schramm
Apr 15, 1995·Lancet·J M GlancyD P de Bono
Jul 1, 1995·Journal of the American College of Cardiology·J S PerkiömäkiH V Huikuri
Aug 1, 1994·Journal of Cardiovascular Electrophysiology·D J StattersA J Camm
Feb 5, 1994·Lancet·C S BarrA D Struthers
Apr 1, 1994·Circulation·S G PrioriP J Schwartz
Oct 15, 1993·The American Journal of Cardiology·G BujaA Nava
Citations
Aug 9, 2002·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Bülent B AltunkeserMustafa Aydin
May 21, 1999·The American Journal of Cardiology·A TamuraM Nasu
Nov 13, 2001·The American Journal of Cardiology·P LancellottiL A Piérard
Feb 22, 2005·International Journal of Cardiology·Yasushi AkutsuTakashi Katagiri
Feb 24, 2001·Clinical Cardiology·B TakaseA Kurita
Apr 14, 2000·Clinical Cardiology·Y KoideK Ishikawa
Nov 4, 2000·Clinical Cardiology·A KumarP Denes
Jul 27, 1999·Japanese Heart Journal·H MushaM Murayama
Nov 28, 2002·Japanese Heart Journal·Nobuyuki HashimotoMasahiro Murayama
Apr 24, 2003·Clinical Cardiology·T G LyrasA A Zacharoulis
Oct 26, 1999·The Annals of Pharmacotherapy·C M White